Commissioning of CSCs and

Peripheral Crates

Task L

M. Ignatenko

UCLA

October 09 2006

Start of CSCs installation

The installation of cathode strip chambers started in June 2003

Installation of the first chamber on an iron disk.

The chambers were installed layer by layer and then were cabled.

432 CSCs have been installed including 72 Dubna chambers

Installation of the ME+1/3 chamber

36 ME-1/3 CSCs need to be installed

CSC’s Readout Electronics

CSC

CFEBCFEBCFEB CFEB

ALCT1 of 24

CFEB

1 of 2

LVDB

LVDB

AFEB

CFEB

ALCT

MPC

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

CCB

VME

CONTROLLER

Peripheral C

rates

(on iron disks)

DCS

TTC Crate

Track Finder Crate Readout Data

FED

Crates

(in US

C55)

in USC55

TMB-RAT

DMBCCB

MPC DDU DCC

1 of 5

1 of 5

38 Peripheral Crates (out of 60) have been installed

Time diagram of CSC installation and commissioning

0

100

200

300

400

Time

Num

ber o

f cha

mbe

rs Installed

Cabled

Commissioned

With problems

MTCCPC commissioning on + side

CHAMBER CABLES EXTENSION CABLES

(1 )

PORTABLE RACK

(2 )( 3 )

(4 )

(VME & LV POWER}

HV GAS DAQ PC

1

2

34

5

6

AC POWER

Portable set-up for CSC commissioning

4 – AFEB analog noise & threshold

2 – Anode connectivity

5 – SCA noise

3 – Cathode connectivity

1. Slow Control V/I

6 – Comparator noise

7 – Comparator logic 8 – Chamber noise at nominal HV

List of CSC Tests

It takes usually 4-6 hours to test one chamber in perfect conditionsIt can take a number of days to find a problem, eliminate it and retest the chamber in question

Skew-clear cable revision problem

Skew clear cable data transfer at 280 MHz

0

20

40

60

80

100

120

0 5 10 15 20 25

Cable length in meters

Dat

a tr

ansf

er

with

out

erro

rs Rev A,B

Rev C,D

1. It was found that we have two type of skew clear cables: Production Revisions A and B - have delay 4.7 ns/meter Production Revisions C and D – have delay 5.2 ns/meter

2. They differ in terms of data transfer capability:

Chamber noise problem

360 Hz 590 Hz

• Each 15-20th installed chamber needs training either at 3.8 kV or with reverse HV at 3.3-3.4 kV.

• Training of chambers with reverse HV polarity helped in most cases.

•Two chambers had to be replaced because the training didn’t help

ME+2/2/17-039 ME+4/1/06-005

Noisy channels

Unexpected cross-talks

ME-3/2/08-145

ME+3/2/18-075

Test pulse was sent to the test strip of the plane #3

Test pulse was sent to the test strip of the plane #4

AFEB problems

1 ME+3/2/15-051 AFEB#21 Flaky behavior of ch #53 pl #5

2 ME-3/2/12-110 AFEB#7 Dead channel #17 in plane #2

3 ME+2/2/30-130 AFEB#12 Dead channel h#29 in plane #6

4 ME+3/1/11-017 AFEB#27 Dead channel #65 in plane #5

5 ME+2/2/26-070 AFEB#19 Dead channels #49-50 in plane #2

6 ME+3/1/03-026 AFEB#23 Dead channel #61 in plane #4

7 ME+2/1/06-018 AFEB#7 Dead channel #21 in plane #2

8 ME-4/1/15-021 AFEB#14 Channel 33 in plane 3 showed efficiency 55%

9 ME-4/1/12-035 AFEB#12 Channel #28 in plane 5 showed efficiency 60%

10 ME+3/1/12-028 AFEB#15 Dead channel #27 in plane #6

Test pulse was sent

to the test strip of plane #2

• 2 AFEB were replaced (one needs threshold < 0, second one had large crosstalk

• ME-1/2/16 – two wire groups in the plane #6 have a short

• ME-2/1/09 – one AFEB shows unstable behavior (2-9 channels cab be dead)

Slice test CSC

Three types of CSC electronics noise observed

RMS of SCA pedestals RMS of SCA pedestals AFEB threshold noise

Mostly seen in planes 3, 4, 5 Mostly seen in planes 1, 2, 6 So far seen in planes 1, 3, 5

Proposed aluminum shield

Possible source of CFEB noise

Our LV power supplies can be a source of the CFEB noise. LV cable jackets connected to a crate with LV power supplies causes CFEB noise in some chambers.

There are 3 types of chambers:

• Good

•Acceptable

•Noisy

CFEB noise of ME+2/2/28

MTCC, DQM results for Global run 2599 CSC commissioning set-up, Sep 08

Our set-up sees less CFEB noise level

Summary of replacements

• 5 boards had mechanical damages:– LVDB – broken input connector– LVMB – broken switch– ALCT – broken input connector– CFEB – broken latch, input connectors

• 20 CFEBs were replaced:a. 14 CFEBs – dead channels, low response to the test pulse, no comparators, no data, … b. 6 CFEBs - by mistakes

• 5 LVMB – read wrong currents

• 5 ALCT: a. four boards had 1.8 V fuse burnt outb. one board couldn’t been readout

• 9 cables: a. one DMB-LVDB was damaged b. eight skew clear cables

• 4 CSCs: a. two chambers couldn’t hold HV > 2.7 kVb. two chambers had unacceptable level of noise

Summary table of known problems

Disc Installed Commissioned Problems Plane Cross-talk

AFEB

Cable probl

LVBD-LVMB

AFEB ch dead,

short

CFEB Noise

YE-1 36 36 1 1

YE-2 108 108 13 1 1 8 2 1

YE-3 18 18 1 1

YE+1 72 72

YE+2 108 108 15 1 4 9 1

YE+3 18 18 1 1

- Must be repaired

- Can be fix, but needs board replacement or taking a chamber down

- Can be ignored

Boards in Peripheral Crate (PC)

MPC

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

DMB

TMB

CCB

CONTROLLER

Data acquisition Motherboard (DMB)

VME Crate Controller

(VCC)

Trigger Motherboard (TMB) and RPC-ALCT Transition module (RAT)

Muon Port Card (MPC)

Clock & Control Board (CCB)

60 Peripheral Crates for CSC’s in Total.

Lists of new boards and tests

1. Crate Controller - 1

2. CCB - 1

3. MPC - 1

4. DMB - 9

5. TMB - 9

6. RAT - 9

7. PCRB -1

8. MPCB - 1

9. Back plane - 1

1. Timing of ALCT Rx and Tx

2. Timing of CFEB Rx

3. Wire scan

4. Strip comparator scan

5. TMB test

6. DMB test

7. TMB-MPC test

8. TMB-RAT self test

FAST site tests (calibration)

Peripheral crate commissioning report

1. There was not comparator data from CFEB #2 of ME+1/2/35 chamber.

2. The low voltage control cable on ME+1/2/36 chambers didn’t work.

3. The ALCT fuse on 1.8 V power line of ME-4/1/11 burnt out.

4. Two CFEB-DMB skew-clear cables were swept.

PC commissioning summary

• 62 PC have been assembled and tested in ISR before shipping to SX5 for final installation

• 38 PC have been installed filled up with electronics and cabled

• 24 PC passed through the first stage of the commissioning

• The first stage of installed PC commissioning on minus side has started (3 PC have been commissioned).

User Interface http://cmsdoc.cern.ch/CSC/TESTB/

Instructions

Traveller

Summary Table

AFEB Thresholds

Test-B Database

Our plans for 2006-2007

1. Commissioning of 36 ME-1/3 chambers which are going to be installed in November-December 2006.

2. Fix the problems on as many CSCs as possible before they go down the shaft.

3. Installed most of the Peripheral Crates, fill them up with electronics, and hook up skew clear cables.

4. Finish first stage of Peripheral Crate commissioning before disks are moved down the shaft.

5. Redesign set-up for PC commissioning (add FED crate and TTCVi crate.

6. Develop the software for CSC calibration using PC control and readout.

7. Develop a database for storage the results of the tests.8. Commissioning new set-up for PC and on-chamber

electronics test.

Plans on 2006-2007

1. PC commissioning and integration with CSCs.

2. PC and CSC integration with XDAQ.

3. PC and CSCs integration with cross-DAQ (DQM).

M&O of CSC system 2008-2009

1. Full calibration of CSC and CSC’s electronics.2. Using particles coming from interaction point

make calibration of:I. HV sectors (18 for small CSC and 30 for big ones)II. Time adjustment of ALCT delays for precision BXIII. Trigger time adjustment of CSC in PCsIV. ALCT-CLCT trigger time decision for the chambers in

PCs

3. M&O of the system:– Control and monitoring CSC performance– CSC repair– Failed board replacement– Participation in data taking runs – shifts on duty